1.

Carbon has large number of allotropes of which crystalline forms are diamond, graphite and fullerenes. Amorphous forms are coal, coke wood charcoal animal charcoal, lamp black, gas carbon, petroleum coke, sugar charcoal (Atomic radius of C = 0.77A^(@)) The inter layer distance in graphite is

Answer»

Very small, the layers being tightly packed
Ten times GREATER than the covalent radius of carbon
APPROXIMATELY 4.5 times the covalent radius of carbon
The same as the covalent radius of carbon

SOLUTION :C - CB. L is `to1.42A^(@)`
layer distance `to3.35A^(@)`
Approximately `4(1)/(2)` times the covalent radius of carbon


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